noteuclid/refraction
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numzero 2024-05-27 20:17:54 +03:00
parent 073292b9de
commit 196d387c1f
1 changed files with 39 additions and 4 deletions
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43
src/bin/flat.rs
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@ -1,3 +1,4 @@
use std::f32::consts::PI;
use flo_draw::*;
use flo_canvas::*;
use glam::*;
@ -10,6 +11,17 @@ use approx::assert_abs_diff_eq;
const DT: f32 = 0.1;
fn draw_loop(gc: &mut Vec<Draw>, mut pts: impl Iterator<Item=Vec2>) {
gc.new_path();
let Some(first) = pts.next() else { return; };
gc.move_to(first.x, first.y);
for pt in pts {
gc.line_to(pt.x, pt.y);
}
gc.close_path();
gc.stroke();
}
pub fn main() {
with_2d_graphics(move || {
let canvas = create_drawing_window("Refraction");
@ -30,13 +42,36 @@ pub fn main() {
draw_fan(gc, &tube, vec2(-500.0, 0.0), vec2(1.0, 0.0), 1.0);
gc.stroke_color(Color::Rgba(1.0, 0.5, 0.0, 1.0));
draw_fan_2(gc, &space, vec2(-500.0, 0.0), vec2(1.0, 0.0), 1.0);
gc.stroke_color(Color::Rgba(0.0, 0.5, 1.0, 0.5));
draw_fan(gc, &tube, vec2(0.0, -0.5 * tube.internal_halflength), vec2(1.0, 1.0), 1.0);
gc.stroke_color(Color::Rgba(0.0, 0.5, 1.0, 1.0));
draw_fan_2(gc, &space, vec2(0.0, -0.5 * tube.internal_halflength), vec2(1.0, 1.0), 1.0);
draw_track(gc, &space, vec2(-500.0, 0.0), vec2(1.0, 0.2));
draw_track(gc, &space, vec2(-500.0, 0.0), vec2(1.0, 0.5));
draw_track(gc, &space, vec2(-0.5 * tube.inner_radius, -1.25 * tube.external_halflength), vec2(0.1, 1.0));
for y in [-1.25, -1.00, -0.85, -0.50, 0.00, 0.40, 0.70, 0.95, 1.05] {
let pos = vec2(0.0, y * tube.external_halflength);
gc.new_path();
gc.circle(pos.x, pos.y, 5.0);
gc.fill_color(Color::Rgba(0.0, 0.5, 1.0, 1.0));
gc.fill();
gc.stroke_color(Color::Rgba(0.0, 0.0, 0.0, 0.5));
draw_loop(gc, itertools_num::linspace(0.0, 2.0 * PI, 32).skip(1).map(|φ| {
let dir = Vec2::from_angle(φ) * 20.0;
let dir = space.flat_to_global(pos, dir);
pos + dir
}));
gc.stroke_color(Color::Rgba(0.0, 0.5, 1.0, 0.5));
draw_loop(gc, itertools_num::linspace(0.0, 2.0 * PI, 32).skip(1).map(|φ| {
let dir = Vec2::from_angle(φ) * 20.0;
let dir = space.flat_to_global(pos, dir);
space.trace_step(Ray { pos, dir }).pos
}));
gc.stroke_color(Color::Rgba(0.5, 0.0, 1.0, 1.0));
draw_loop(gc, itertools_num::linspace(0.0, 2.0 * PI, 32).skip(1).map(|φ| {
let dir = Vec2::from_angle(φ);
let dir = space.flat_to_global(pos, dir);
space.trace_iter(Ray { pos, dir }).nth(20).unwrap().pos
}));
}
});
});
}